msp430读写info flash

是的。由这两个寄存器配置时钟频率

FSSELx:时钟模式 FNx:时钟分频

感谢回答。那么我在低功耗应用场合外接32k晶振作为时钟，如何得到合适的频率范围呢？

感谢回答。那么我在低功耗应用场合外接32k晶振作为时钟，如何得到合适的频率范围呢？

可以参考这个例程

//******************************************************************************
// MSP430F41x2 Demo - Flash In-System Programming, Copy SegC to SegD
//
// Description: This program first erases flash seg C, then it increments all
// values in seg C, then it erases seg D, then copies seg C to seg D.
// ACLK = n/a, MCLK = SMCLK = CALxxx_1MHZ = 1MHz
// //* Set Breakpoint on NOP in the Mainloop to avoid Stressing Flash *//
//
// MSP430F41x2
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
//
// P. Thanigai
// Texas Instruments Inc.
// January 2009
// Built with CCE Version: 3.1 and IAR Embedded Workbench Version: 4.11
//******************************************************************************
#include <msp430.h>

char value; // 8-bit value to write to seg C

// Function prototypes
void write_SegC(char value);
void copy_C2D(void);

int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer

FCTL2 = FWKEY + FSSEL0 + FN1; // MCLK/3 for Flash Timing Generator
value = 0; // initialize value

while(1) // Repeat forever
{
write_SegC(value++); // Write segment C, increment value
copy_C2D(); // Copy segment C to D
__no_operation(); // SET BREAKPOINT HERE
}
}

void write_SegC(char value)
{
char *Flash_ptr; // Flash pointer
unsigned int i;

Flash_ptr = (char *)0x1040; // Initialize Flash pointer
FCTL3 = FWKEY; // Clear Lock bit
FCTL1 = FWKEY + ERASE; // Set Erase bit
*Flash_ptr = 0; // Dummy write to erase Flash seg

FCTL1 = FWKEY + WRT; // Set WRT bit for write operation

for (i = 0; i < 64; i++)
{
*Flash_ptr++ = value; // Write value to flash
}

FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Set LOCK bit
}

void copy_C2D(void)
{
char *Flash_ptrC; // Segment C pointer
char *Flash_ptrD; // Segment D pointer
unsigned int i;

Flash_ptrC = (char *)0x1040; // Initialize Flash segment C ptr
Flash_ptrD = (char *)0x1000; // Initialize Flash segment D ptr
FCTL3 = FWKEY; // Clear Lock bit
FCTL1 = FWKEY + ERASE; // Set Erase bit
*Flash_ptrD = 0; // Dummy write to erase Flash seg D
FCTL1 = FWKEY + WRT; // Set WRT bit for write operation

for (i = 0; i < 64; i++)
{
*Flash_ptrD++ = *Flash_ptrC++; // copy value segment C to seg D
}

FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Set LOCK bit
}